rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=13869, q=611 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294959051-4294948549), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g13869 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26320 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 5071 Comm: syz-fuzzer Not tainted 6.9.0-syzkaller-09429-g61307b7be41a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 49 d1 0b 00 48 83 c4 08 4c 89 f7 e8 ed 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 c0 91 24 0a e8 ab fa 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000361f5e8 EFLAGS: 00000282
RAX: 742c936f12c91000 RBX: ffff8880280b5a00 RCX: ffffffff94760603
RDX: dffffc0000000000 RSI: ffffffff8bcab880 RDI: ffffffff8c1ee360
RBP: ffffc9000361f630 R08: ffffffff8faba06f R09: 1ffffffff1f5740d
R10: dffffc0000000000 R11: fffffbfff1f5740e R12: 1ffff110172a7e9f
R13: dffffc0000000000 R14: ffff8880b953e780 R15: ffff8880b953f4f8
FS:  000000c000058890(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32429000 CR3: 0000000020f34000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x179e/0x4a00 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_add+0x6/0x190 kernel/sched/core.c:5860
Code: 48 8b 3c 24 e8 ab 1a 93 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 89 fb 48 c7 c0 e0 06 76 94 48 c1 e8 03 49 bf 00 00 00 00
RSP: 0018:ffffc9000361f9d8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff11005016b40 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcab880 RDI: 0000000000000001
RBP: ffff8880280b5a00 R08: ffffffff8faba06f R09: 1ffffffff1f5740d
R10: dffffc0000000000 R11: fffffbfff1f5740e R12: dffffc0000000000
R13: 1ffff920006c3f48 R14: ffffffff8b89a060 R15: ffff8880280b6c78
 __schedule_loop kernel/sched/core.c:6821 [inline]
 schedule+0x144/0x320 kernel/sched/core.c:6837
 schedule_hrtimeout_range_clock+0x2a9/0x480 kernel/time/hrtimer.c:2289
 ep_poll fs/eventpoll.c:2062 [inline]
 do_epoll_wait+0x1d79/0x2040 fs/eventpoll.c:2464
 do_epoll_pwait+0x56/0x1e0 fs/eventpoll.c:2498
 __do_sys_epoll_pwait fs/eventpoll.c:2511 [inline]
 __se_sys_epoll_pwait fs/eventpoll.c:2505 [inline]
 __x64_sys_epoll_pwait+0x2b8/0x310 fs/eventpoll.c:2505
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40720e
Code: 48 83 ec 38 e8 13 00 00 00 48 83 c4 38 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c000087748 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000040720e
RDX: 0000000000000080 RSI: 000000c000087818 RDI: 0000000000000004
RBP: 000000c000087790 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000246 R12: 000000c000087820
R13: 000000c000058800 R14: 000000c000007040 R15: 0000000000000053
 </TASK>